undef

s1a-iw-grd-vh-20180825t163219-20180825t163244-023405-028c00-002_filter

s1a-iw-grd-vv-20180825t163219-20180825t163244-023405-028c00-001_filter

s1a-iw-grd-vh-20180825t163219-20180825t163244-023405-028c00-002_winddir

s1a-iw-grd-vv-20180825t163219-20180825t163244-023405-028c00-001_winddir